Temperature-regulating fabrics composed of natural fibers

ABSTRACT

Temperature-regulating fabrics composed of natural fibers that are wearable in all seasons and provide high-performance thermal regulation and excellent wicking and absorbency properties. The temperature-regulating natural fabrics disclosed herein are composed of a blend of cotton, hemp, and linen present in an amount of between 84% and 100% of the total composition. In some embodiments, the temperature-regulating natural fabric displays a high amount of stretch and a low amount of growth.

CROSS-REFERENCE TO RELATED APPLICATIONS

This Application is related to and claims priority to Pakistan Application No. PK 894/2020, filed Dec. 29, 2020, entitled THE IDEA OF SUSTAINABLE, ALL SEASONS FUNCTIONAL, FABRICS WITH 100% NATURAL FIBERS, the entirety of which is incorporated herein by reference.

GOVERNMENT RIGHTS STATEMENT

N/A.

FIELD

Novel fibers that are adaptive for all seasons in terms of temperature, moisture management, wicking, absorbency, and air permeability.

BACKGROUND

Textiles are important worldwide, and the estimated value of the global textile industry was US $920 billion in 2018. However, the production of many synthetic fibers and materials, such as polyester and nylon, contributes to microplastic pollution, greenhouse gases, carbon emissions, and other detrimental environmental effects. In fact, some research suggests that the textile industry causes more environmental degradation than any other industry.

Additionally, thermo-physiological properties play a large role in moisture and heat transportation from the wearer's skin to the environment and, thus, overall wearer comfort. The major components of thermo-physiological properties are heat, air, and moisture management. There are many products currently available with thermoregulating properties, but these are accomplished with the use of synthetic materials. These materials give a plastic hand feel, which is typically undesirable.

Consequently, many consumers seek clothing and other items made from all-natural and sustainable materials. However, textiles made with such fibers often do not provide the benefits of synthetic materials and composite synthetic-natural materials, such as temperature regulation, moisture wicking and promotion of dryness, stretch with good recovery, and good thermal insulation without added weight or bulk.

SUMMARY

Some embodiments advantageously provide fabrics that are wearable in all seasons that provide high-performance thermal regulation and excellent wicking and absorbency properties. These environmentally friendly fabrics are made with all-natural fabrics with organic and biodegradable materials.

In one embodiment, a temperature-regulating natural fabric comprises: natural fibers, the natural fibers being at least 84% of a total composition, wherein the natural fibers include all of cotton, hemp, and linen.

In one aspect of the embodiment, cotton is at least 55% of the total composition.

In one aspect of the embodiment, hemp is at least 14% of the total composition.

In one aspect of the embodiment, linen is at least 5% of the total composition.

In one aspect of the embodiment, temperature-regulating natural fabric further comprises at least one synthetic fiber.

In one aspect of the embodiment, the synthetic fiber is polyester.

In one aspect of the embodiment, the synthetic fiber is an elastic fiber.

In one aspect of the embodiment, the synthetic fiber is at least 6% of the total composition.

In one aspect of the embodiment, the temperature-regulating natural fabric has a tear strength in the warp direction of at least 6400 g.

In one aspect of the embodiment, the temperature-regulating natural fabric has a tear strength in the weft direction of at least 4900 g.

In one aspect of the embodiment, the temperature-regulating natural fabric has a tensile strength in the warp direction of at least 68 kg.

In one aspect of the embodiment, the temperature-regulating natural fabric has a tensile strength in the weft direction of at least 32.9 kg.

In one aspect of the embodiment, the temperature-regulating natural fabric has a stretch percentage of at least 36.6%.

In one aspect of the embodiment, the temperature-regulating natural fabric has a growth percentage of at most 8.36%.

In one aspect of the embodiment, the temperature-regulating natural fabric has an absorbency value of 1 second.

In one aspect of the embodiment, the temperature-regulating natural fabric has a wicking value in the warp direction of at least 3.5 inches per 30 minutes.

In one aspect of the embodiment, the temperature-regulating natural fabric has a wicking value in the weft direction of at least 3.5 inches per 30 minutes.

In one aspect of the embodiment, the temperature-regulating natural fabric has a CLO value of at least 0.2.

In one embodiment, a temperature-regulating natural fabric comprises: cotton being at least 55% of the total composition; hemp being at least 14% of the total composition; and linen being at least 9% of the total composition.

In one aspect of the embodiment, cotton is approximately 57% of the total composition, hemp is approximately 19% of the total composition, and linen is approximately 11% of the total composition, the temperature-regulating fabric further comprising: approximately 11% polyester; and approximately 2% spandex.

BRIEF DESCRIPTION OF THE DRAWINGS

A more complete understanding of embodiments described herein, and the attendant advantages and features thereof, will be more readily understood by reference to the following detailed description when considered in conjunction with the accompanying drawings wherein:

FIG. 1 shows a front view (left side) and a back view (right side) of a first embodiment of a temperature-regulating natural fabric, in accordance with the present disclosure;

FIG. 2 shows a front view (left side) and a back view (right side) of a second embodiment of a temperature-regulating natural fabric, in accordance with the present disclosure;

FIG. 3 shows a front view (left side) and a back view (right side) of a third embodiment of a temperature-regulating natural fabric, in accordance with the present disclosure;

FIG. 4 shows a front view (left side) and a back view (right side) of a fourth embodiment of a temperature-regulating natural fabric, in accordance with the present disclosure;

FIG. 5 shows a front view (left side) and a back view (right side) of a fifth embodiment of a temperature-regulating natural fabric, in accordance with the present disclosure;

FIG. 6 shows a front view (left side) and a back view (right side) of a sixth embodiment of a temperature-regulating natural fabric, in accordance with the present disclosure;

FIG. 7 shows a front view (left side) and a back view (right side) of a seventh embodiment of a temperature-regulating natural fabric, in accordance with the present disclosure;

FIG. 8 shows a front view (left side) and a back view (right side) of an eighth embodiment of a temperature-regulating natural fabric, in accordance with the present disclosure;

FIG. 9 shows a front view (left side) and a back view (right side) of a ninth embodiment of a temperature-regulating natural fabric, in accordance with the present disclosure;

FIG. 10 shows an exemplary embodiment of a weave pattern of a temperature-regulating fabric composed of natural fibers, in accordance with the present disclosure; and

FIG. 11 shows a charted representation of the weave pattern of FIG. 10, in accordance with the present disclosure.

DETAILED DESCRIPTION

Before describing in detail exemplary embodiments, it is noted that the embodiments reside primarily in combinations of apparatus components and steps related to temperature-regulating fabrics composed of natural fibers and that provide high-performance thermal regulation to the wearer. Accordingly, the system and method components have been represented where appropriate by conventional symbols in the drawings, showing only those specific details that are pertinent to understanding the embodiments of the present disclosure so as not to obscure the disclosure with details that will be readily apparent to those of ordinary skill in the art having the benefit of the description herein.

Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure belongs. It will be further understood that terms used herein should be interpreted as having a meaning that is consistent with their meaning in the context of this specification and the relevant art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.

The novel temperature-regulating fabrics composed of natural fibers disclosed herein (which may be referred to herein as “temperature-regulating natural fabrics”) display many desirable traits and exclusive thermo-physiological properties. The temperature-regulating natural fabrics disclosed herein are composed of a blend of all-natural fibers of cotton, hemp, and linen, and these natural fibers make up at least 84% of the total composition of the temperature-regulating natural fabrics. In some embodiments, the temperature-regulating natural fabric is composed entirely (100%) of a blend of cotton, hemp, and linen. In other embodiments, the temperature-regulating natural fabric includes synthetic fibers as well, such as spandex and/or polyester, with the natural fibers being at least 84% of the total composition and the synthetic fibers being a small portion of the total composition (16% or less). In some embodiments, the temperature-regulating natural fabrics disclosed herein are well-suited for use in the production of activewear or denim. Further, test data indicates that the temperature-regulating natural fabrics disclosed herein are superior to currently known natural fabrics in many characteristics, including tear strength, tensile strength, stretch, growth, absorbency, wicking, and CLO.

Tearing strength may be defined as the force required to start or to continue to tear a fabric under certain conditions, in either the weft or warp direction. According to international standards, textile tear strength for denim fabrics ranges from 3100-4300 g in the warp direction and 2100-3300 g in the weft direction, depending on the weight of the fabric (grams per square meter). However, the temperature-regulating natural fabrics of the present disclosure surprisingly show a tear strength of above 6000 g and 4700 g in warp and weft directions, respectively, which is very high compared other fabrics composed of natural fibers.

Tensile strength may be defined as the ability of a fabric to withstand a pulling, or tensile, force. According to international standards, tensile strength of denim fabrics ranges from 40-65 kg in the warp direction and 30-40 kg in the weft direction, which ranges are met by the temperature-regulating natural fabrics of the present disclosure.

Many fabrics are created to have a certain amount of stretch, or ability to be elongated and then recover to its original dimension. The growth of a fabric, or the amount of stretch retained by a fabric after tension is applied to the fabric for an extended period of time and then released. For example, excess growth is a major issue in stretchy fabrics, as it produces undesirable bagginess and sagging after the garment is worn fora period of time. However, the temperature-regulating natural fabrics of the present disclosure display very low growth rates according to their respective stretch. For example, mill style A6 shown in Table 2 desirably has a stretch value of 39%, but a growth value of only 4%.

Finally, moisture wicking and thermal insulation properties of a fabric are important for the wearer's comfort. If the absorbency of the fabric is above 5 seconds (that is, if it takes more than 5 seconds for 100% absorbency of one drop of fluid, per international testing standard AATCC TM79 Appendix 12-4M), then the fabrics are not qualified to pass the standard, but temperature-regulating natural fabrics of the present disclosure have shown an absorbency value of less than 5, and in at least one case an absorbency value of 1, and therefore have passed the standard. Wicking properties also play an important role in temperature regulation and wearer comfort. The higher the absorbency and wicking values of the fabric, the more moisture is transported from the wearer. This, in turn, leads to faster moisture evaporation and a cooling effect is produced as the moisture changes from the liquid state to the vapor state. A fabric's CLO value is the measure of its thermal insulation ability. A CLO value of 1 is equal to the amount of clothing required by a resting human to maintain thermal comfort at room temperature (approximately 21° C.). The CLO values of fabrics used for apparel may vary. For example, a T-shirt has an estimated CLO value of 0.08, trousers composed of a thick fabric have an estimated CLO value of 0.24, and a down jacket has an estimated CLO value of 0.55. Normally fabrics for apparel purposes require a CLO value of 0.1 as per required standard; however, the temperature-regulating natural fabrics of the present disclosure display CLO values of approximately 0.20-0.28, which is highly acceptable and considered as an achievement in fabrics using natural fibers.

Table 1, shown below, includes three currently known natural fibers and properties thereof is shown. Specifically, Table 1 shows, for each of cotton, flax (linen), and hemp, the following properties: linear density (tex), length (mm), diameter (μm), density (g/cm³), moisture regain (%), tenacity (cN/tex), Young's modulus (GPa), thermal stability (° C.), and degradation (° C.):

TABLE 1 Property Cotton Flax (Linen) Hemp Linear density (tex) 0.15-0.4  0.2-2.0 2.2-3.0 Length (mm) 10-50 Up to 900 15-25 Diameter (μm) 14-21 17-20 15-30 Density (g/cm³) 1.52-1.56 1.5 1.48-1.49 Moisture regain (%) 8.5 12 12 Tenacity (cN/tex) 17-38 40-80 47-80 Young's modulus (GPa) 30 100 96 Thermal stability (° C.) 150 150 150 Degradation (° C.) 175-205 175-205 175-205

Cotton is a cellulosic fiber produced by the cotton plant and found within bolls, or protective cases, around the seeds of the plant. Although cotton fibers can be dyed and readily retain color, cotton plants may be grown that produce cotton fibers of different colors (including shades of red, green, and brown). China, India, Iran, Pakistan, and Egypt are the main producers of cotton and cotton products today. Linen is a cellulosic fiber that grows inside the stalks of the flax plant, which is one of the oldest cultivated plants in human history. Fabric produced from linen fibers also bears the same name. Similarly, hemp, a fiber produced by Cannabis sativa (hemp) plants, is one of the fastest-growing plants on Earth and it is believed to have been first exploited as a usable fiber about 50,000 years ago. Today, hemp fiber may be used to produce such products as paper, rope, textiles, clothing, biodegradable plastics, paint, insulation, food, animal feed, biofuel, and others. Cotton, linen, and hemp are all environmentally friendly, sustainable, and fully biodegradable natural fibers.

Table 2, shown below, includes a list of exemplary embodiments of temperate-regulating fabrics composed of natural fibers and the performance and composition thereof. Specifically, Table 2 includes nine exemplary temperature-regulating natural fabrics developed in accordance with the present disclosure. Each temperature-regulating natural fabric is referred to by a mill style number of A1-B3 and may be composed exclusively of natural fibers or a mixture of natural (making up a majority percentage of the composition) and synthetic fibers (making up a minority percentage of the composition). The temperature-regulating natural fabrics shown in Table 2 are each referred to as an “adaptive composition,” meaning that the natural fabric can adapt to an environmental temperature and respond accordingly to provide comfort to the wearer.

TABLE 2 Mill Style Performance Fabric Composition A1 Adaptive 60% cotton, 23% hemp, 10% linen, Composition 6% Coolmax ®, 1% Lycra ® A2 Adaptive 58% cotton, 16% hemp, 10% linen, Composition 15% Coolmax ®, 1% Lycra ® A3 Adaptive 55% cotton, 20% hemp, 12% linen, Composition 12% polyester, 1% Lycra ® A4 Adaptive 62% cotton, 14% hemp, 10% linen, Composition 12% polyester, 2% Lycra ® A5 Adaptive 68% cotton, 15% hemp, 9% linen, Composition 6% T400 ®, 2% Lycra ® A6 Adaptive 57% cotton, 19% hemp, 11% linen, Composition 11% Repreve ® Sorbtek ®, 2% Lycra ® B1 Adaptive 76% cotton, 15% hemp, 9% linen Composition B2 Adaptive 60% cotton, 25% hemp, 15% linen Composition B3 Adaptive 68% cotton, 16% hemp, 10% linen, Composition 5% T400 ®, 1% Lycra ®

The first exemplary temperature-regulating natural fabric is composed of approximately 60% (±2%) cotton, approximately 23% (±2%) hemp, approximately 10% linen (±1%), approximately 6% (±1%) Coolmax® polyester (The Lycra Company LLC, Wilmington, Delaware), and approximately 1% (±0.25%) Lycra® spandex (The Lycra Company LLC, Wilmington, Del.). In one non-limiting example, as shown in Table 2 as mill style A1, the fabric is composed of 60% cotton, 23% hemp, 10% linen, 6% Coolmax® polyester, and 1% Lycra® spandex. Mill style A1 is shown in FIG. 1.

The second exemplary temperature-regulating natural fabric is composed of approximately 58% (±2%) cotton, approximately 16% hemp (±2%), approximately 10% linen (±1%), approximately 15% (±2%) Coolmax® polyester, and approximately 1% (±0.25%) Lycra®. In one non-limiting example, as shown in Table 2 as mill style A2, the fabric is composed of 58% cotton, 16% hemp, 10% linen, 15% Coolmax® polyester, and 1% Lycra® spandex. Mill style A2 is shown in FIG. 2.

The third exemplary temperature-regulating natural fabric is composed of approximately 55% (±2%) cotton, approximately 20% (±2%) hemp, approximately 12% (±1%) linen, approximately 12% (±1%) polyester, and approximately 1% (±0.25%) Lycra®. In one non-limiting example, as shown in Table 2 as mill style A3, the fabric is composed of 55% cotton, 20% hemp, 12% linen, 12% polyester, and 1% Lycra® spandex. Mill style A3 is shown in FIG. 3.

The fourth exemplary temperature-regulating natural fabric is composed of approximately 62% cotton (±2%), approximately 14% (±2%) hemp, approximately 10% (±1%) linen, approximately 12% (±1%) polyester, and approximately 2% (±0.25%) Lycra®. In one non-limiting example, as shown in Table 2 as mill style A4, the fabric is composed of 62% cotton, 14% hemp, 10% linen, 12% polyester, and 2% Lycra® spandex. Mill style A4 is shown in FIG. 4.

The fifth exemplary temperature-regulating natural fabric is composed of approximately 68% (±2%) cotton, approximately 15% (±2%) hemp, approximately 9% (±1%) linen, approximately 6% (±1%) T400® elastic fiber (The Lycra Company LLC, Wilmington, Del.), and approximately 2% (±0.25%) Lycra®. In one non-limiting example, as shown in Table 2 as mill style A5, the fabric is composed of 68% cotton, 15% hemp, 9% linen, 6% T400® elastic fiber, and 2% Lycra® spandex. Mill style A5 is shown in FIG. 5.

The sixth exemplary temperature-regulating natural fabric is composed of approximately 57% (±2%) cotton, approximately 19% (±2%) hemp, approximately 11% (±1%) linen, approximately 11% (±1%) Repreve® Sorbtek® synthetic fiber (for example, polyester) (Unifi, Inc., Greensboro, N.C.), and approximately 2% (±0.25%) Lycra® spandex. In one non-limiting example, as shown in Table 2 as mill style A6, the fabric is composed of 57% cotton, 19% hemp, 11% linen, 11% Repreve® Sorbtek® synthetic fiber, and 2% Lycra® spandex. Mill style A6 is shown in FIG. 6.

The seventh exemplary temperature-regulating natural fabric is composed of approximately 76% (±3%) cotton, approximately 15% (±2%) hemp, and approximately 9% (±1%) linen. In one non-limiting example, as shown in Table 2 as mill style B 1, the fabric is composed of 76% cotton, 15% hemp, and 9% linen. Mill style B1 is shown in FIG. 7.

The eighth exemplary temperature-regulating natural fabric is composed of approximately 60% (±2%) cotton, approximately 25% (±2%) hemp, and approximately 15% (±2%) linen. In one non-limiting example, as shown in Table 2 as mill style B2, the fabric is composed of 60% cotton, 25% hemp, and 15% linen. Mill style B2 is shown in FIG. 8.

The ninth exemplary temperature-regulating natural fabric is composed of approximately 68% (±2%) cotton, approximately 16% (±2%) hemp, approximately 10% (±1%) linen, approximately 5% (±1%) T400® elastic fiber, and approximately 1% (±0.25%) Lycra® spandex. Mill style B3 is shown in FIG. 9.

Table 3, shown below, includes the nine exemplary embodiments of temperature-regulating natural fabrics of Table 2 and the physical properties thereof. The properties of the temperature-regulating natural fabrics shown in Table 3 were measured from a 3/1 (or 3×1, meaning three warp threads per one weft thread) right-hand twill (RHT) fabric. The number of warp threads per inch (ends/inch) range from 72-96 and the number of weft threads per inch (picks/inch) range from 43-63. The weight of the fabric ranges from 8.25-12.68 oz/yd². The temperature-regulating natural fabrics having the physical properties shown in Tables 2 and 3 were used to produce the test data shown in Tables 4 and 5 below.

TABLE 3 Mill Warp Weft Ends/ Picks/ Style Weave Color Count Count Inch Inch Oz/yd² A1 3/1 RHT Pure 11/1 12/1 80 50 9.20 Indigo A2 3/1 RHT Pure 11/1 12/1 80 50 9.23 Indigo A3 3/1 RHT Pure 11/1 30/1 94 63 8.25 Indigo A4 3/1 RHT Pure 11/1 16/1 92 57 9.85 Indigo A5 3/1 RHT Pure 11/1 11/1 84 50 10.20 Indigo A6 3/1 RHT Pure 11/1 25/1 96 60 9.08 Indigo B1 3/1 RHT Pure 5.7/1  5.7/1  72 43 12.68 Indigo B2 3/1 RHT Pure 8.5/1  5.7/1  72 43 12.18 Indigo B3 3/1 RHT Pure 8.5/1   9/1 72 48 10.70 Indigo

Referring now to FIGS. 10 and 11, an exemplary embodiment of a weave pattern of a temperature-regulating natural fabric having the physical properties shown in Table 3 is shown in FIG. 10. FIG. 11 shows a charted representation of the weave pattern of FIG. 10. In one non-limiting example, the fabric may be produced using a dobby air-jet loom. The weave pattern shown in FIGS. 10 and 11 is a 3/1 right-hand twill (RHT). In FIG. 10, warp threads are indicated with reference number 10 and weft threads are indicated with reference number 12.

The exemplary embodiments of the temperature-regulating natural fabrics disclosed herein were prepared or finished after weaving. In some embodiments, a temperature-regulating natural fabric as disclosed herein is a denim fabric. Fabric finishing can play an important role in fabric properties, such as softness, appearance, and residual shrinkage. The finishing process may vary from harsh hand (loom state), soft hand (desizing), and sulfur over dyeing. Further, the particular type of finishing used can depend on customer needs.

In some embodiments, a temperature-regulating natural fabric disclosed herein is woven using an air-jet loom and rapier loom. In some embodiments, the fabric is woven in conditions in which temperature and humidity are 22° C. (±2° C.) and 65% (±2%), respectively.

In some embodiments, a temperature-regulating natural fabric disclosed herein is singed to burn protruding and fuzzy fibers from the surface of the fabric. For example, singeing may be conducted on both sides of the fabric to create smooth surfaces.

In some embodiments, warp yarn of a temperature-regulating natural fabric disclosed herein is sized before the fabric is woven to help the yarn withstand tension during weaving and to reduce breakage. Once the weaving process is complete, the fabric may then be de-sized at specific conditions. For example, the temperature-regulating natural fabric may be de-sized with acid, alkali, or oxidizing agents, soaked in hot water, or the like.

In some embodiments, a temperature-regulating natural fabric disclosed herein is washed to remove any stains and/or impurities from the fabric and to enhance softness and comfort properties of the fabric.

In some embodiments, a temperature-regulating natural fabric disclosed herein is rinsed after being washed. In some embodiments, the fabric is rinsed with water, such as pure water. Although rinsing may not have a major effect on the physical properties of the fabric, the fabric is carefully evaluated because even small changes in the fabric may have a large effect on a sewn product made with the fabric.

In some embodiments, a temperature-regulating natural fabric disclosed herein is sanforized before sewing, or treated to reduce the amount of shrinkage that would otherwise occur after the first wash. Sanforized fabrics shrink approximately 2-3%, whereas unsanforized fabrics shrink as much as 10% after the first wash.

Tables 4 and 5, shown below, include the nine exemplary embodiments of temperature-regulating natural fabrics of Tables 2 and 3 and test data thereof.

TABLE 4 Tear Tear Tensile Tensile Strength, Warp Strength, Weft Strength, Warp Strength, Weft Mill Direction Direction Direction Direction Style (g) (g) (kg) (kg) A1 6988 4992 72.4 34.3 A2 7040 7718 68.1 51.1 A3 6387 4787 69.3 32.9 A4 6489 5068 75.1 38.7 A5 6387 5824 72.3 41.3 A6 6374 7219 73.8 64.4 B1 6412 5376 80.5 58.7 B2 6412 8166 80.2 70.4 B3 7462 6643 78.9 48.2

TABLE 5 Wicking, Wicking, Warp Weft Mill Stretch Growth Absorbency Direction Direction Style (%) (%) (sec) (in/30 min) (in/30 sec) CLO A1 48.82 7.87 4.3 3.5 3.625 0.280 A2 36.61 6.30 4.0 3.87 3.625 0.240 A3 41.73 6.30 4.5 4.25 3.625 0.201 A4 55.12 8.36 3.5 3.875 3.625 0.224 A5 45.67 8.27 4 4.25 3.875 0.201 A6 38.93 4.33 1 5.5 5.25 0.206 B1 — — 4.5 3.5 3.5 0.237 B2 — — 4.5 3.5 3.625 0.222 B3 28.35 6.69 3.5 3.875 3.625 0.206

As shown in Table 4, all of the embodiments of temperature-regulating natural fabrics disclosed herein (A1-B3) display a textile tear strength of more than 6000 g for warp yarn and of more than 4700 g for weft yarn, which is much greater than the industry standards of textile tear strength of between 3100-4300 g for warp yarn and 2100-3300 g for weft yarn. As is also shown in Table 4, the embodiments of temperature-regulating natural fabrics disclosed herein display tensile strength of 68.1-80.5 kg in the warp direction and 32.9-70.4 in the weft direction, which, in some embodiments, is greater than industry standards of 40-65 kg in the warp direction and 30-40 kg in the weft direction.

As shown in Table 5, some embodiments of the temperature-regulating natural fabrics disclosed herein (A1-A6) display a desirable combination of good stretch properties of 36.61% or more and low growth rates of 8.36% or less. For example, mill style A6 displays a stretch value of above 38.93% and a growth value of only 4.33%. Thus, a temperature-regulating natural fabric according to at least mill styles A1-A6 will be sufficiently stretchy to add comfort to clothing and will also allow the clothing to retain its shape after being stretched. As is also shown in Table 5, the temperature-regulating natural fabrics disclosed herein display good absorbency, wicking, and CLO values, which makes these fabrics comfortable to wear. All mill styles display absorbency values of less than 5 seconds and, in fact, mill style A6 displays a very low absorbency value of 1 second. For example, these fabrics not only absorb an acceptable amount of moisture, but also facilitate rapid evaporation, which provides a cooling effect to the wearer in warmer weather, and provide sufficient thermal insulation to keep the wearer comfortable in cooler weather.

In one embodiment, these are all novel fabrics. Previously these types of fabrics were not developed or used in any industry with these specifications and results.

In one embodiment, all the work such as yarn spinning, fabrics weaving, finishing and maximum testing is completed at Naveena Exports Ltd. as Naveena Exports Ltd. is a denim fabric company and it has all the fabric sampling and weaving facilities.

In one embodiment, these fabrics can give a warmth feeling in winter as well as cool feeling in summer so we can say these fabrics as “all season wearable denim fabrics developed from natural fibers with high performance body thermal regulation.”

In one embodiment, wicking and moisture management are the key factors in terms comfort and performance of body. These fabrics have shown marvelous body moisture management properties by depicting excellent wicking and absorbency properties.

Natural sustainability is the primary objective of any research, these all are environment friendly fabrics having 85 to 100% natural fibers with organic and biodegradable materials.

It will be appreciated by persons skilled in the art that the present invention is not limited to what has been particularly shown and described herein above. In addition, unless mention was made above to the contrary, it should be noted that all of the accompanying drawings are not to scale. A variety of modifications and variations are possible in light of the above teachings without departing from the scope and spirit of the invention. 

What is claimed is:
 1. A temperature-regulating natural fabric, comprising: natural fibers, the natural fibers being at least 84% of a total composition, wherein the natural fibers include all of cotton, hemp, and linen.
 2. The temperature-regulating natural fabric of claim 1, wherein cotton is at least 55% of the total composition.
 3. The temperature-regulating natural fabric of claim 1, wherein hemp is at least 14% of the total composition.
 4. The temperature-regulating natural fabric of claim 1, wherein linen is at least 5% of the total composition.
 5. The temperature-regulating natural fabric of claim 1, further comprising at least one synthetic fiber.
 6. The temperature-regulating natural fabric of claim 5, wherein the synthetic fiber is polyester.
 7. The temperature-regulating natural fabric of claim 5, wherein the synthetic fiber is an elastic fiber.
 8. The temperature-regulating natural fabric of claim 5, wherein the synthetic fiber is at least 6% of the total composition.
 9. The temperature-regulating natural fabric of claim 1, wherein the temperature-regulating natural fabric has a tear strength in the warp direction of at least 6400 g.
 10. The temperature-regulating natural fabric of claim 1, wherein the temperature-regulating natural fabric has a tear strength in the weft direction of at least 4900 g.
 11. The temperature-regulating natural fabric of claim 1, wherein the temperature-regulating natural fabric has a tensile strength in the warp direction of at least 68 kg.
 12. The temperature-regulating natural fabric of claim 1, wherein the temperature-regulating natural fabric has a tensile strength in the weft direction of at least 32.9 kg.
 13. The temperature-regulating natural fabric of claim 1, wherein the temperature-regulating natural fabric has a stretch percentage of at least 36.6%.
 14. The temperature-regulating natural fabric of claim 1, wherein the temperature-regulating natural fabric has a growth percentage of at most 8.36%.
 15. The temperature-regulating natural fabric of claim 1, wherein the temperature-regulating natural fabric has an absorbency value of 1 second.
 16. The temperature-regulating natural fabric of claim 1, wherein the temperature-regulating natural fabric has a wicking value in the warp direction of at least 3.5 inches per 30 minutes.
 17. The temperature-regulating natural fabric of claim 1, wherein the temperature-regulating natural fabric has a wicking value in the weft direction of at least 3.5 inches per 30 minutes.
 18. The temperature-regulating natural fabric of claim 1, wherein the temperature-regulating natural fabric has a CLO value of at least 0.2.
 19. A temperature-regulating natural fabric, comprising: cotton being at least 55% of the total composition; hemp being at least 14% of the total composition; and linen being at least 9% of the total composition.
 20. The temperature-regulating fabric of claim 19, wherein cotton is approximately 57% of the total composition, hemp is approximately 19% of the total composition, and linen is approximately 11% of the total composition, the temperature-regulating fabric further comprising: approximately 11% polyester; and approximately 2% spandex. 